Drainage device

ABSTRACT

The present invention discloses a of drainage device comprising a drainage device main body, a filter, a seal member and a fixing member, characterized in that, several protrusions are provided in equal interval around an outer circumferential surface of the drainage device main body. The fixing member is a circular ring that corresponds in shape with the drainage device main body. An annular groove is provided along a circumference of a back side of the circular ring. Notches in number corresponding to that of the protrusions are provided in equal interval around an inner circumferential surface of the circular ring. Several locking slots each in shape of an arc and continuously arranged one by one in the same direction are provided around the inner circumferential surface of the circular ring along each of the notches. Several self-locking pins are also provided on the circular ring. The drainage device according to the present invention changes the traditional way of installing a drainage device by threaded connection; instead, it utilizes locking connection attainable by coordination between protrusions, locking slots and self-locking pins and such connection is high in reliability, simple to assemble and convenient to disassemble.

BACKGROUND OF THE INVENTION

The present invention relates to sanitary wares and more particularly pertains to a drainage device used on a washing basin.

A common washing basin (such as a vegetable washing basin used in a kitchen) is provided with a drainage hole in the middle of the basin. A drainage device (drainer) is sealingly installed inside the drainage hole and it is also sealingly connected to a drainage pipe. Sealing between the drainage device and the drainage hole is very important, otherwise, waste water in the basin would leak out easily. In the prior art, installation of a drainage device is generally attained by threaded connection: outer screw threads are provided around the drainage device's outer surface while inner screw threads are provided on a fixing member of the drainage device, and by fitting a seal member such as a seal ring, sealed installation would be attained. However, a drainage device installed in this way would get loose easily during the course of use, thereby causing problems such as leakage.

BRIEF SUMMARY OF THE INVENTION

In view of the aforesaid disadvantages now present in the prior art, the present invention provides a structurally improved drainage device which attains sealed connection between a drainage device and a drainage hole and which is also high in reliability and convenient to install.

Accordingly, the present invention adopts the following technical proposal: A drainage device which comprises a drainage device main body, a filter, a seal member and a fixing member, characterized in that, several protrusions are provided in equal interval around an outer circumferential surface of the drainage device main body. The fixing member is a circular ring that corresponds in shape with the drainage device main body. An annular groove is provided along a circumference of a back side of the circular ring. Notches in number corresponding to that of the protrusions are provided in equal interval around an inner circumferential surface of the circular ring. Several locking slots each in shape of an arc and continuously arranged one by one in the same direction are provided around the inner circumferential surface of the circular ring along each of the notches. Several self-locking pins are also provided on the circular ring.

Each of the protrusions is in shape of a water droplet.

The locking slots provided along each of the notches are three in number and they extend from an edge of the corresponding notch to a bottom edge of the inner circumferential surface of the circular ring and are arranged in an oblique line.

The protrusions and the notches are both three in number.

The self-locking pins are three in number.

The drainage device according to the present invention changes the traditional way of installing a drainage device by threaded connection; instead, it utilizes locking connection attainable by coordination between protrusions, locking slots and self-locking pins and such connection is high in reliability, simple to assemble and convenient to disassemble.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of the present invention.

FIG. 2 is a sectional view of the present invention.

FIG. 3 is a schematic illustration of the installing of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

A preferred embodiment of the present invention is further described in detail below with reference to the accompanying drawings. For the parts of the present invention which are technically the same as the prior art, reference is drawn to the prior art.

As shown in FIG. 1 and FIG. 2, the present embodiment comprises a filter 1, a drainage device main body 2, a seal member formed by a seal ring 3 and a seal ring fixing member 4, a fixing member 5, a plastic tube 6 and a connection screw cap 7. Three protrusions 21 each in shape of a water droplet are provided in equal interval around an outer circumferential surface of the drainage device main body 2. The fixing member 5 is a circular ring that corresponds in shape with the drainage device main body. An annular groove is provided along a circumference of a back side of the circular ring. Three notches 51 are provided in equal interval around an inner circumferential surface of the circular ring. Three locking slots 52 each in shape of an arc and continuously arranged one by one in same direction are provided around the inner circumferential surface of the circular ring along each of the three notches 51. The locking slots 52 extend from an edge of each of the notches 51 to a bottom edge of the inner circumferential surface of the circular ring and in each case, they are arranged in an oblique line as shown in FIG. 1 and FIG. 3. Three self-locking pins 53 are also provided on the circular ring. The self-locking pins 53 could be rotably installed on an upper end surface of the circular ring.

As shown in FIG. 3, during installation, when the drainage device main body 2 is fitted into a drainage hole of a washing basin 8, the drainage main body 2 is held by its fringe on an upper surface of the drainage opening and it is then fitted with the seal ring 3, the seal ring fixing member 4 and the fixing members 5 in sequential order. After that, rotate the fixing member 5 and fix the protrusions 21 into the locking slots 52 and the drainage device is then preliminarily fixed. Next, rotate the self-locking pins 53 to a substantially vertical position and the seal ring 3 is therefore pressed and tightened, thereby attaining sealed connection between the drainage device and the drainage opening. Finally, by connecting the drainage device with the plastic tube 6 and the connection screw cap 7 in sequential order, installation of the drainage device is completed.

Since each of the notches 51 is provided with several locking slots 52 continuously arranged one by one in an oblique line, a suitable locking slot could be selected during use according to the width of a gap between the drainage device and the drainage hole, thereby fulfilling the installation requirements pertaining to washing basins 8 with different thickness.

The present invention could have many other embodiments. A person skilled in the scope of art of the present invention could make various changes and alteration to the present invention correspondingly as long as they do not deviate from the spirit and essence of the present invention and all these corresponding changes and alteration should also fall within the scope of protection according to the claims of the present invention. 

What is claimed is:
 1. A drainage device which comprises a drainage device main body, a filter, a seal member and a fixing member, characterized in that, several protrusions are provided in equal interval around an outer circumferential surface of the drainage device main body; the fixing member is a circular ring that corresponds in shape with the drainage device main body; an annular groove is provided along a circumference of a back side of the circular ring; notches in number corresponding to that of the protrusions are provided in equal interval around an inner circumferential surface of the circular ring; several locking slots each in shape of an arc and continuously arranged one by one in same direction are provided around the inner circumferential surface of the circular ring along each of the notches; several self-locking pins are also provided on the circular ring.
 2. The drainage device as in claim 1, characterized in that, each of the protrusions is in shape of a water droplet.
 3. The drainage device as in claim 1, characterized in that, the locking slots provided along each of the notches are three in number and they extend from an edge of the corresponding notch to a bottom edge of the inner circumferential surface of the circular ring and arranged in an oblique line.
 4. The drainage device as in any of claims 1 to 3, characterized in that, the protrusions and the notches are both three in number.
 5. The drainage device as in any of claims 1 to 3, characterized in that, the self-locking pins are three in number. 